Question

Which of the following phenomena is due to propagation of a wave?

• A. Vibration of a window panel when a supersonic aircraft passes
• B. Transportation of particles of a medium when a wave passes
• C. Breaking of glasses by opera singers by singing
• D. Both (a) and (c)

Answer 1

The correct option is D Both (a) and (c)

We know that a wave carries energy and momentum while propagating in a medium.

When a supersonic aircraft passes, it causes window panels to vibrate because of the transfer of energy and momentum. Change in momentum develops pressure on the panel, which causes vibrations in it.

Similarly, opera singers break glasses by singing.

When a wave propagates in a medium, the particles of the medium vibrate to and fro about their positions and do not get transported from one place to another.
Hence, option (d) is correct [both (a) and (c)].